Magnesium Citrate Tablets 700mg, 120 tablets
£13.99 for 120 tablets at Simply Supplements. That works out at 2p per 100 mg citrate, which ranks it 1st of the 38 magnesium citrate products we price across 12 UK retailers.
At one 100 mg dose a day, this pack lasts 2.3 years. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 120 ÷ 1 per serving = 120
- In the pack: 120 × 700 mg = 84 g
- £13.99 ÷ 84 g × 100 mg = 1.67p per 100 mg citrate
- A week 1.67p × 7 = 12p · a month × 30 = 50p · a year × 365 = £6.08
- Amount per serving: estimated from the compound weight using our conversion factor.
The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.
How it compares: magnesium citrate
All 38, ranked →
Ranked purely by price per 100 mg magnesium. 187 combination products also contain magnesium.
On the label
- Magnesium · Citrate
- 700 mg per serving (estimated from the compound weight using our conversion factor)
- Pack
- 120 tablets · 120 servings · 1 tablet(s) a serving
- Cost per serving
- 12p (120 servings in the pack)
More label details
- Barcode
- 5056049519879
- Sold by
- Simply Supplements
- What the listing says
- “Magnesium Citrate Tablets 700mg” · “confirmed from the retailer's own product page, not this listing's text: pack units 120; pack unit type tablet; units per serving 1.0”
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One 100 mg dose is our comparison unit, not a recommendation.
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Filled in from the label’s serving: 1 tablet.
What you paid
Optional. At Simply Supplements today: £13.99.
“Order by” allows 3 working days’ delivery from Simply Supplements and your spare days.
Price history
No price change since 21 September 2026. Checked on 29 days, most recently 20 October 2026.
- Price at every check
- £13.99Simply Supplements
- First recorded
- £13.9921 Sept
- Checked on
- 29 dayssince 21 Sept
- First checked at Simply Supplements: £13.99
Questions about this product
How much does Simply Supplements Magnesium Citrate Tablets 700mg cost per 100 mg citrate?
2p per 100 mg citrate, from £13.99 for 120 tablets at Simply Supplements, checked on 20 October 2026.
Is it the cheapest magnesium citrate in the UK?
Yes. Of the 38 we price across 12 UK retailers, this is the cheapest per 100 mg citrate.
How long does one pack last?
2.3 years at one 100 mg dose. The pack holds 84 g in total.
About Simply Supplements
Founded 2004 · Yaxley, Peterborough, England
Simply Supplements is an online vitamins and supplements retailer that started in Guernsey in 2004 and is now based in Yaxley, near Peterborough. It is the trading name of Pinnacle Health Nutrition Ltd, a privately owned UK company.
All 134 Simply Supplements products, priced per doseVisit Simply Supplements (opens in a new tab)
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